Water-gage glass.



Patented Apr. 9, 190|.

J. DEVANTEHY. WATER GAGE GLASS.

( Application led Mar. 24, 1900.)

(No Model.)

UNITED STATES PATENT OFFICE.

JOSEPH DEVANTERY, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE LOOOMOBILECOMPANY OF AMERICA, OF NEW YORK, N. Y.

WATER-GAGE GLASS.

SPECIFICATION forming part of Letters Patent No. 671,858, dated April 9,1901.

Application filed March 24, 1900. Serial NO- 10,005- (NO 111011610 T0a/ZZ whom/ i mJa/y concern,.-

Be it known that 1, JOSEPH DEVANTERY, of Brooklyn, in the county ofKings and State of New York, have invented certain new and usefulImprovements in Water-Gages, of which the following is a specification.

This invention relates to Water-gages for steam-boilers of the kindemploying the usual sight-tube and a float inclosed therein forindicating clearly the level of the Water in said tube.

One object of the invention is to retain the fioat permanently withinthe tube.

The accompanying drawing represents a vertical sectional View of theglass and oat of a gage embodying my improvements, the boiler and theremaining parts of the gage being shown in dotted lines.

l designates the glass sigh t-tube of the gage. The fittings of thegage, in which the ends of the tube are secured, are represented indotted lines at 2 2 and the boiler at 3.

4 is a suitable iioat, such `as a hollow glass body, contained withinthe tube l and adapted to float upon the surface of the column of waterin said tube, indicating by its position the height of said column. Theuse of a Iioat within the sight-tube renders it desirable to employ somemeans to prevent the egress of said oat from the tube and its lodgmentin either of the fittings 2 2. in accordance with my present inventionby turning the walls of the tube inwardly at their ends 5 5, leavingcontracted orifices 6 6 of less than the internal diameter of thetube-body and less than the diameter of the oat 4. The float is therebyprevented from escaping from the tube at either end of the latter. Asthe float is permanently retained within the tube, the tube and ioat canbe supplied as a unit, thereby avoiding certain assembling and handlingoperations and dispensing with the use This I accomplish of separateretainers, such as have heretofore been employed to keep the floatwithin the tube.

`The ends of the glass are rounded when in a plastic state due to theapplication of heat, and an incidental effect of rounding the ends is tostrengthen the glass and secure a better seat for its ends in theboiler-fittings. Gageglasses are usually made by cutting a long tubeinto lengths, leaving surfaces of fracture on the ends of the glasses.Such glasses are liable to crack under pressure because of the minutesecondary fractures which often accompany the main fracture or cleavageand because of the tendency of the sharp edges to chip and start thesesecondary fractures. By rounding over the ends the sharp edges areremoved and the secondary fractures, if present at first, areobliterated. Furthermore, a glass with rounded ends is more easilypacked and seated in the gage-ttings than one with abrupt ends and isless liable to break after being fitted.

Having thus explained the nature of my invention and described a Way ofconstructing and using the same, though without attempting to set forthall of the forms in which it may be made or all the modes of its use,what I claim, and desire to secure by Letters Patent, is-

A gage-glass comprising a glass tube containing a float and having itsedges at both ends rounded or turned inwardly to form contractedorifices which retain the oat within the tube.

In testimony whereof I have affixed my signature in presence of twowitnesses.

JOSEPH DEVANTERY.

